flex-center() {
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-center{
  background-color: #f8f8f8;
  padding: 2rem 0 10rem 0;
  .center-aside{
    .avatar{
      flex-center()
      flex-direction: column;
      background: white;
      img{
        width: 8rem;
        border-radius: 4rem;
        margin: 2rem 0 0 0;
      }
      p.username{
        margin: .8rem 0;
        font-size: 16px;
      }
      .tags {
        flex-center()
        .tag {
          border: .1rem solid #35BDB2;
          border-radius: .2rem;
          margin: 0 .5rem;
          color:white;
          background-color: #35BDB2;
          font-size: 12px;
          padding: .2rem .5rem;
          span {
            margin: 0 0.5rem;
            font-size: 10px;
          }
        }
      }
      p.desc{
        font-size: 12px;
        color: #262626;
        margin: .5rem;
      }

    }
    .aside-item {
      background-color: white;
      width: 100%;
      height: 60px;
      margin-top: 10px;
      display: flex;
      align-items: center;
      i.fa {
        font-size: 20px;
        font-weight: 200;
        margin: 0 20px;
        color: #35BDB2;
        cursor: pointer;
      }
      a {
        font-size: 16px;
        color: #262626;
        &.router-link-active{
          color: #35BDB2;
          text-decoration: none;
        }
      }
      span {
        width: 6px;
        height: 6px;
        border-radius: 3px;
        background-color: red;
      }
    }
  }
  .center-circle {
    .has-no-cicle{
      text-align: center;
      button {
        font-size: 18px;
        padding: 1rem 4rem;
        border: none;
        outline: none;
        background-color: #fa5e5b;
        color: white;
        border-radius: .5rem;
        &:focus, &:hover{
          outline: none;
          background-color: lighten(#fa5e5b, 5%)
        }
      }
      .desc {
        margin: 3rem 0;
        color: #6C6C6C;
        font-size: 18px;
      }
      .explore{
        display: block;
        color: #6C6C6C;
        margin-top: 5rem;
        padding: .5rem;
        border-radius: 5px;
        background-color: #f8f8f8;
        &:hover {
          background-color: #f8f8f8;
          cursor: pointer;
          color: #35BDB2;
        }
      }
    }
    .my-circle{

    }

  }
  .center-project {
    .has-no-project{
      text-align: center;
      button {
        font-size: 18px;
        padding: 1rem 4rem;
        border: none;
        outline: none;
        background-color: #fa5e5b;
        color: white;
        border-radius: .5rem;
        &:focus, &:hover{
          outline: none;
          background-color: lighten(#fa5e5b, 5%)
        }
      }
      .desc {
        margin: 3rem 0;
        color: #6C6C6C;
        font-size: 18px;
      }
      .explore{
        display: block;
        color: #6C6C6C;
        margin-top: 5rem;
        padding: .5rem;
        border-radius: 5px;
        background-color: #f8f8f8;
        &:hover {
          background-color: #f8f8f8;
          cursor: pointer;
          color: #35BDB2;
        }
      }
    }
    .my-project{

    }
  }
  .center-index {
    .notice-item {
      border-radius: .4rem;
      height: 5rem;
      background-color: #f6f6f6;
      margin-bottom: 1rem;
      padding: 0 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .collect-list, .books-list, .circle-list, .project-list{
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
    }
    .collect-item {
      height: 120px;
      width: 100px;
      text-align: center;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
    }
    .book-item {
      height: 200px;
      width: 140px;
      text-align: center;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
    }
    .article-list {
      position: relative;
    }
    .article-item {
      display: table-row;
      img{
        display: table-cell;
        margin: 1rem 2rem;
      }
      .article {
        padding-top: 1.5rem;
        display: table-cell;
        vertical-align: top;
        .title {
          small {
            color: #6C6C6C;
            margin-left: 2rem;
          }
        }
        .abstract {
          margin: .8rem 1rem .5rem 0;
        }
        .tools {
          i.fa {
            color: #6C6C6C;
            margin-right: 1rem;
          }
        }
      }
    }
    .circle-item {
      &:hover{
        opacity: .5;
      }
    }
    .project-item {

    }
  }
  .center-workbench {
    .has-no-project{
      text-align: center;
      button {
        font-size: 18px;
        padding: 1rem 4rem;
        border: none;
        outline: none;
        background-color: #fa5e5b;
        color: white;
        border-radius: .5rem;
        &:focus, &:hover{
          outline: none;
          background-color: lighten(#fa5e5b, 5%)
        }
      }
      .desc {
        margin: 3rem 0;
        color: #6C6C6C;
        font-size: 18px;
      }
      .explore{
        display: block;
        color: #6C6C6C;
        margin-top: 5rem;
        padding: .5rem;
        border-radius: 5px;
        background-color: #f8f8f8;
        &:hover {
          background-color: #f8f8f8;
          cursor: pointer;
          color: #35BDB2;
        }
      }
    }
    .my-project{

    }
  }
  .center-develop {

  }
}
